v0.3.0

Changes

• Added doctest annotation, which allows doctesting code examples without >> prefix.

Fixes

• Fixed code block parsing not terminating after closing a comment block.
• Fixed expressions with reserved keywords being parsed inappropriately.

Misc

• Added travis config to push to gh-pages
• Added official docs to README.
• Fixed examples and typos on README.
• Clarified examples and descriptions on README.
• Refactored some code.